ExpressionParser.cpp

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//===-- ExpressionParser.cpp ----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include "lldb/Expression/ExpressionParser.h"
#include "lldb/Expression/DiagnosticManager.h"
#include "lldb/Expression/IRExecutionUnit.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/ThreadPlanCallFunction.h"
 
using namespace lldb;
using namespace lldb_private;
 
Status ExpressionParser::PrepareForExecution(
    addr_t &func_addr, addr_t &func_end,
    std::shared_ptr<IRExecutionUnit> &execution_unit_sp,
    ExecutionContext &exe_ctx, bool &can_interpret,
    ExecutionPolicy execution_policy) {
  Status status =
      DoPrepareForExecution(func_addr, func_end, execution_unit_sp, exe_ctx,
                            can_interpret, execution_policy);
  if (status.Success() && exe_ctx.GetProcessPtr() && exe_ctx.HasThreadScope())
    status = RunStaticInitializers(execution_unit_sp, exe_ctx);
 
  return status;
}
 
Status
ExpressionParser::RunStaticInitializers(IRExecutionUnitSP &execution_unit_sp,
                                        ExecutionContext &exe_ctx) {
  Status err;
 
  if (!execution_unit_sp.get()) {
    err = Status::FromErrorString(
        "can't run static initializers for a NULL execution unit");
    return err;
  }
 
  if (!exe_ctx.HasThreadScope()) {
    err = Status::FromErrorString(
        "can't run static initializers without a thread");
    return err;
  }
 
  std::vector<addr_t> static_initializers;
 
  execution_unit_sp->GetStaticInitializers(static_initializers);
 
  for (addr_t static_initializer : static_initializers) {
    EvaluateExpressionOptions options;
 
    ThreadPlanSP call_static_initializer(new ThreadPlanCallFunction(
        exe_ctx.GetThreadRef(), Address(static_initializer), CompilerType(),
        llvm::ArrayRef<addr_t>(), options));
 
    DiagnosticManager execution_errors;
    ExpressionResults results =
        exe_ctx.GetThreadRef().GetProcess()->RunThreadPlan(
            exe_ctx, call_static_initializer, options, execution_errors);
 
    if (results != eExpressionCompleted) {
      err = Status::FromError(execution_errors.GetAsError(
          lldb::eExpressionSetupError, "couldn't run static initializer:"));
      return err;
    }
  }
 
  return err;
}